/*
 * (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 * [See end of file]
 */

package com.hp.hpl.jena.sparql.engine.iterator;

import java.util.Iterator ;

import com.hp.hpl.jena.graph.Node ;
import com.hp.hpl.jena.sparql.core.Var ;
import com.hp.hpl.jena.sparql.engine.ExecutionContext ;
import com.hp.hpl.jena.sparql.engine.binding.Binding ;
import com.hp.hpl.jena.sparql.engine.binding.Binding1 ;

/**
 * Yield new bindings, with a fixed parent, with values from an iterator.
 */
public class QueryIterExtendByVar extends QueryIter
{
    // Use QueryIterProcessBinding?
    /**
	 * @uml.property  name="binding"
	 * @uml.associationEnd  
	 */
    Binding binding ;
    /**
	 * @uml.property  name="var"
	 * @uml.associationEnd  
	 */
    Var var ;
    Iterator<Node> members ;
    
    public QueryIterExtendByVar(Binding binding, Var var, Iterator<Node> members, ExecutionContext execCxt)
    {
        super(execCxt) ;
        this.binding = binding ;
        this.var = var ;
        this.members = members ;
    }

    @Override
    protected boolean hasNextBinding()
    {
        return members.hasNext() ;
    }

    @Override
    protected Binding moveToNextBinding()
    {
        Node n = members.next() ;
        Binding b = new Binding1(binding, var, n) ;
        return b ;
    }

    @Override
    protected void closeIterator()
    { }
}

/*
 * (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */